Watch the video on the pronunciation of the -ed and do some practice.
Revision on the present perfect
https://www.perfect-english-grammar.com/present-perfect-exercise-4.html
https://www.perfect-english-grammar.com/present-perfect-exercise-5.html
https://www.perfect-english-grammar.com/past-simple-present-perfect-4.html
https://www.perfect-english-grammar.com/present-perfect-present-perfect-continuous-1.html
https://www.perfect-english-grammar.com/present-perfect-present-perfect-continuous-2.html
Watch this video and practise high numbers: